US430764A - Electric lock - Google Patents

Description

(No Model.)

0. B. BEERS 81; W. B. TUTTLE.

ELECTRIC LOOK. No. 430,764. Patented June 24, 1890.

I UNITED STATES PATENT Trice.

CHARLES E. BEERS AND \VILLIAM B. TUTTLE, OF BRIDGEPORT, CONNECTICUT.

ELECTRIC LOCK.

SPECIFICATION forming part of Letters Patent No. 430,764, dated June 24, 1890.

Application filed November 16, 1889. Serial No. 330,561. (No model.)

T0 on whom it may concern.-

useful improvements in looks and latches, but

more particularly refers to latches which are operated by the usual knob-and-spindle attaohment.

The object of our present, invention is to improve upon the construction shown and described in Letters Patent No. 396,723 issued January 29, 1889, to Charles B. Beers.

In the accompanying drawings, Figure 1 is a plan of an ordinary Niles door-lock with the casing removed and showing our improvement as it appears in connection with said look when the latch -operating tumbler is locked; and Fig. 2, a similar view, but showing the said tumbler unlocked.

Similar letters denote like parts in both figures of the drawings.

A is the lock-casing; B, the latch; C, the latch-spindle; D, the latch-operating tumbler, having a nose E, which engages with the heel of the spindle C, whereby when the said tumbler is thrown back the latch will be withdrawn; F, a spring which bears against the rear of the spindle, whereby the movement of the latch is rendered resilient, and G is a spring which bears against the heel of the tumbler D and causes the latter to return to normal position after the latch has been withdrawn. All these parts above set forth constitute the latch-operating mechanism of the Niles lock, and we will now proceed to describe our invention and the use thereof in connection with said mechanism.

H is an oscillatory block pivoted at a to the casing, and I the tumbler-block loosely pivoted around a stud l), proj ectingfrom the block, said tumbler-block being guided in ways J,

cast with the casing. 3y swinging the block up and down the bolt is caused to shoot behind and away from the shoulder K on the tumbler, thus locking and unlocking the latter, as will be clearly seen from the drawings. A spring L bears against the stud c at the lower end of the block H, whereby the bolt is shot with a spring action behind the shoulder K.

M is the operating-lever, pivoted at (Z to the casing and abutting at one end against the bottom of the lower end of the block Ill.

N is a spring secured to the casing and the bottom of a stud c, projecting from this abutting end of the lever, whereby said endisnormally sustained in elevation... This spring N is more powerful than the spring L, the result being that when said spring N is allowed to perform its function the bolt I will be withdrawn in the manner shown at Fig. 2. The other end of the leveris provided with a shoulder f, and a pin 9 projects upward from said lever at a point between said shoulder and the pivotal point of the lever.

O is a cross-pin secured to the latch-spindle, and extending laterally beyond the pin 9 so that when the latch is withdrawn the crosspin will strike said pin g, and thereby swing the lever M, so as to throw the shoulder fupward and the stud c downward, for the purposes presently explained. Of course it will be clearly seen that when the stud c is depressed thespring L will act to throw the belt I behind the shoulder K to lock the tumbler D.

P is'an ordinary magnet secured within the casing, the coil-wires being run to any suitable and ordinary push-button circuit-closer.

Q is an L-shaped armature, pivoted at h to the casing so as to swing freely. One leg of this armature is within the field of the magnet P,while the other end is provided with a hook i.

R is a spring secured to the armature and bearing against a post S, cast with the casing, the tendency of said spring being to throw the armature away from the magnet, whereby the lower leg of said armature is thrown toward the lever M. The relative positions of the hook t' and shoulder f are such thatwhen said shoulder is thrown upward said hook will latch beneath the shoulder, and thcrebyhold the lever M against the face of the spring N, as shown at Fig. 1. The operation of ourimprovement is as follows: The parts being in the position shown in Fig. 1, the latch-operating tumbler D is of course locked; but if the magnet be vitalized by closing the circuit the armature will be attracted, thereby releasing the shoulder f, and causing the lever M to operate by reason of the spring action to retract the bolt I, so that the tumbler D may be operated to withdraw the latch B. Now as the latch is thus withdrawn the crosspin 0 will strike the pin g, whereby the shoul- (ler f is thrown up and engaged with the hook 1' and the other end of the lever forced down to permit the spring L to throw the bolt 1 bebind the shoulder K on the tumbler, whereby the latter is locked.

We do not wish to be understood as claiming, broadly, the feature of the latching-armature or of the intermediate lever, which establishes connection between said armature and the locking mechanism, since we are aware that this is not new; but we have shown a very simple construction, and we desire that the following claims for our specific construction may be granted us:

1. The combination of the latch-spindle C, the tumbler D, having shoulder K, the bolt I, the pivoted-block H, having studs 1) 0, spring L, whereby said bolt and shoulder are engaged, lever M, having stud e at one end and shoulder f at the other, said lever being pivoted to the lock-casing, spring N, whereby the lever is normally elevated and said bolt withdrawn, pin g, projecting upward from said lever, crosspin 0, extending laterally from the spindle beyond the pin 9 and adapted to abut against the latter to operate the lever when the latch is retracted, L-shaped armature having ahook i on the lower leg adapted to engage with the shoulder f, the upper leg being within the field of the magnet P, secured in the casing, and spring R, secured to said armature and bearing against the post S, substantially as shown and described.

2. In an electrically-controlled latch, the combination, with the latch-spindle and the knob-tumbler which operates said spindle, of a sliding bolt adapted to engage with and lock said tumbler, a resilient pivoted block, which normally operates to throw said bolt into looking engagement with said tumbler, a pivoted resilient lever, one end of which engages with said block to normally operate the latter, whereby said bolt is withdrawn from said tumbler, the other end being provided with a hook, a projection from the latch-spindle, adapted when the latter is retracted to abut against the said lever and raise the hook end thereof, and a pivoted spring-actuated L-shaped armature whose upper leg is within the field of a magnet secured within the latch-casing, and whose lower leg is provided with a hook adapted to engage with the hook on said lever, substantially as and for the purposes set forth.

In testimony whereof we afiix our signatures in presence of two witnesses.

CHARLES B BEERS. 7 WILLIAM B. TUTTLE. WVitnesses:

. F. XV. SMITH, J r.,

JNo. S. FINcH.

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